Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Optical Radiation from Integer Quantum Hall States in Dirac Materials



Michael Gullans, Jacob M. Taylor, Mohammad Hafezi


Quantum Hall systems exhibit topologically protected edge states, which can have a macroscopic spatial extent. Such edge states provide a unique opportunity to study a quantum emitter whose size far exceeds the wavelength of emitted light. To better understand this limit, we theoretically characterize the optical radiation from integer quantum Hall states in two-dimensional Dirac materials. We show that the scattered light from the bulk reflects the spatial profile of the wavefunctions, enabling spatial imaging of the disorder landscape. We find that the radiation from the edge states are characterized by the presence of large multipole moments in the far-field. This multipole ra- diation arises from the transfer of angular momentum from the electrons into the scattered light, enabling the generation of coherent light with high orbital angular momentum.
Physical Review B


quantum Hall, graphene, topological, orbital angular momentum of light


Gullans, M. , Taylor, J. and Hafezi, M. (2017), Optical Radiation from Integer Quantum Hall States in Dirac Materials, Physical Review B, [online], (Accessed July 16, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created June 30, 2017, Updated November 10, 2018